Furnace construction



1933- J. E. ANDERSON FURNACE CONSTRUCTION Filed July 28, 1930 2Sheets-Sheet 1 MQ M- Aug. 15, 1933- J. E. ANDERSON 1,922,516

FURNACE CONSTRUCTION Filed July 28, 1930 2 Sheets-Sheet 2 r J L U -.W LL L Patented Aug. 15 1933 FURNACE CONSTRUCTION John E. Anderson,Chicago, Ill., 'assignor toi Plibrico Jointless Firebrick Company,Chicago, 111., a Corporation of Illinois I Application July 28,1930.Serial No. 471,165'

11 Claims. (c1. 72 -101) This invention relates to furnace constructionsand more particularly to means for anchoringa lining t'oa furnace wall.

This anchoring means is intended to be used in connection with arefractorylining applied to furnaces, such lining being initially formedof a plastic material. While the anchoring means is intendedparticularly for this use,it can, of course, be used for many otherpurposes, as will be readily understood. In applycondition, it isnecessary to provide anchoring means for securing the lining, as it isformed, to thefurnace wall. It is also necessary that the anchoringmeans be flexible to the extent that it will allow relativemovement ofthe lining under conditions ofuse, both horizontally and. vertically andindependently of the retaining wall, so as to avoid subjecting thelining and the wall to undesirable stresses and resulting injury. 1 t

In thecopending, application of Ivon S. Piet ers Serial No. 123,825,filed July 21, 1926, for

Flexible anchors," there is disclosed ananchor for, use with a furnaceof brick setting and to a certain extent, the refractory lining of thefurnace chamber from the outerretaining wall.

"It is one of the features of my invention that the anchor can besecured directly to the easins by bolting or welding itthereto. This isa decided advantage in a furnace of hollow wall construction inasmuch asthe anchor can be secured directly to the backing ofthe refrac torymaterial, which is'of some heat resisting material, instead of having topass therethrough ,an'dbeconnected to the outer retaining wall.

Another important feature of the'invention is the, provision ofmeans'for fastening such an chors tola furnace of hollowwallconstruction and-of such form as will limit the .movement of therefractory wall toward and awayfro'm the retaining wall and thuseliminate'the use of headers for; such a purpose.

Other objects and advantages'of the invem "non willbe apparent from thefollowing detailed descriptionwhen-taken inconnection with thaccompanying drawings in which: r

Figural is" atop plan viewof the anchor of my invention as used with afurnace 6f hollow Wall construction;

Figure 2 is a fragmentary sectional view of the anchor taken along theline 2-2 of Figure 1;

Figure 3 is an elevational View of the anchor as used with a steelcasing wall;

Figure 4 is a vertical sectional View through a furnace wall and lining,of hollow construction, showing the application of the invention to suchaconstruction; and mg a refractory lining to furnaces in plastic Figure5 is a section takensubstantially along the line 5-5 of Figure 4.

Referring more in detail to the drawings: As best seen in Figure 4, Ihave shown my invention as applied to a furnace of hollow wallconstruction. The outer or retaining wall of the furnace settingcomprises an outer casing 1 of steel or sheet metal against the innerside of which abuts a Wall 2 of heatresisting material,

such as asbestos or magnesium." A suitable .4 is formed of refractorymaterial which, when applied, is in a stiff plastic condition, thismaterial being applied in lumps or chunks which are beaten together .bya suitable mallet to form a monolithic structure, and the. backing 3provides a retaining form orsupport against which the wall is formed.

The flexible. anchor, assembly for anchoring the lining wall 4 to theretaining walll is designated in its entirety by the reference numeral 6and comprises three members 7, 8 and 9. The

member 8 comprises'a single strip of strap metal bent intermediate itsend into. the shape of a reverse or 'ogee curve, to form two arms 10 and11, the purpose of which will be hereinafter explained. Anchorapart 7comprises a base 12 having a relatively long upturned arm 13 and arelatively short upturned arm 14. A slot 15,

(Figures 1 and 2) of sufficient width to accommodate easily the arm 10of member 8, is formed in base.12 adjacent arm 10 as by stamping out alip 16 from the base. Further details of this anchors member may befound in the above mentioned copending application. In applying themember 7 to member 8, it is simply slipped over the arm 10 which extendsupwardly through the slot 15. Due to the slot being of greater Widththan the arm 10, asillustrated in Figure 1, the anchors will permitindependent expansionandf contraction of the innerfiwall 4 in alldirections in the plane thereof due to the relative vertical andtransverse movement between the arm and the member 7.

The anchors are fastened to the retaining wall or casing I by means ofanchor part 9 which comprises a rod of circular cross section. The rod 9is threaded for a small portion of its length at either end for thereception of nuts 17 and 18, and near one of its ends is bowed to form aportion 19 of substantially u shaped configuration. It will be notedthat the bowing of rod 9 forms in effect two flanges 20 and 21,

of which flange 20 is adapted to extend through the backing 3 for thereception of. member 8 which is secured thereon by means of the nut 17.It will also be noted that when the member 8 is mounted upon said rod,the arm 11 of member 8 abuts the backing 3 and that the reverse or ogeecurvature of said member is sufficient to allow the anchor part 7 toplay freely both horizontally and vertically on arm '10 without binding.The U-shaped portion 19 of the rod 9 abuts against the outer side ofbacking 3 and the innerside of the wall 2, with the flange 21- thereofextending through said wall and the outer casing 1, and a channel framemember 30, to which it is secured by the nut 18. By reason of theUshaped portion of the rod abutting against the wall 2 and the backing3, the walls are thus held in spaced relation to preserve the air space5 and the use of headers, which are usually used for such a purpose, isthus eliminated.

In Figures 1 and 2, I have shown a modification in the manner ofmounting the anchors upon the wall. In cases of hollow wall construcetion where it is not desired to use the member 9 for securing the anchorto the retaining wall, the anchors may be secured directly to the back-3 by means of a nut and bolt 22 and 23 respectively, which passesthrough the backing and the arm 11 of member 8. In such a constructionit will, of course, be necessary to provide some means for spacing thebacking 3 from the retaining wall orwall of insulation 2, all as is wellunderstood in the art. The construction of the members 7 and 8 is thesame as that referred to in Figure 4 and a further description of themis not deemed necessary.

In Figure 3, I have shown the anchor as applied to a furnace having ametal casing 1a and a wall of insulation 2a. The member 8a, which hasthe same function as themem'ber 8, is of substantially z shapedconfiguration. The arm 11a, of member 8a, is secured to the casing 1a inany suitable mannensuch as by welding or bolting it thereto. The reverseor ogee curvature of such member is sufilcient to extend through thewall of insulation 2a so that the anchor member 7 may be mounted uponthe arm 10a for free translatory movement in both a horizontal and avertical direction.

In practice a number of lining anchors comprising the member. 8 areemployed, being spaced at suitable distance apart and fastened to theouter casing of the furnace or to the backing or support of themonolithic material, as the case may be. The wall dis then built up tothe member 3. The member '7 is then connected to the member Send theplastic material then pounded around said anchon Any suitable means mayprovided to prevent the plastic material from entering slot .15 andinterfering with the operation of the anchorafter the wall has becomeset and vitrified. Such a means is disclosedfor example, in thecopending application of Roger F. Wiley, Serial No. 475,147, filedAugust 14, 1930, for Lining anchoring means. It is, however, to beunderstood that any other suitable means, such as the placing ofmoistened paper or asbestos about the point between the anchor members,may be employed. The important object is to assure that the connectionbetween the lining anchoring member and the wall anchor member is suchthat the lining is freeto expand and contract both vertically andhorizontally after it has become set and vitrified, and independently oft e'retaining Wall. The wall 4 is separated into sections by means ofthe Corbel construction Figure 4, which is supported by ula,

means of angle strips 33 and 34 bolted or otherwise suitablysecured toframe member 36. Such a construction serves to transmit the weight ofthelining to the channel members 30 and thus prevents the weight of thelining itself from causing buckling and resultant breaking away andspelling ofthe wall. The refractory lining a is disposed below theboiler tubes 31, where the heat is most intense. The upper lining ea maybe of fire brick or other suitable refractory material, as the heat isnot as intense above the tubes 31, as below these tubes. After the wall4 has been erected in the manner described, it is suitably dried andvitrified and the furnace is then in condition for use.

What I claim is:

1. In. a furnace construction, an outer rotaining wall, an inner walldisposed in spaced relation to said outer wall comprising a lining ofrefractory material anda backing therefor, anchor members embedded insaid lining, and means securing said members to said backing and saidouter wall.

2. In a furnace construction, an outer retaining wall, an inner wallcomprising a lining of refractory material and a backing "therefor,

anchor members for securing said lining to said backing, and means forsecuring said anchor members to said backing 'and'for holding said innerwall in spaced relation to said outer wall.

3. In a furnace construction, an outer retaining wall, an innerwallincluding a lining of refractory material, spacing members extendingfrom the outer wall and disposed in abutting relation to said inner andouter walls for holding said inner wall in spaced relation to said outerwall, and means mounted upon the inner portion of said spacing membersfor accommodating expansion and contraction of said inner wall in everydirection in the plane thereof in dependently of the outer wall. V

4. In a furnace construction, an outer retaining wall, an inner wallincluding" alinin'giof refractory material, means for holdingtsaid innerwall in spaced relation to said outer wall and against movement awaytherefrom, and

slon and contraction saidrlining in every direction in the plane thereofindependently of the backing and said outer wall.

6. In a furnace construction, an outer retaining wall, an inner walldisposed in spaced relation to said outer wall and comprising a liningof refractory material and a backing therefor, and a flexible anchorconnecting said lining directly to said backing, said anchor permittingsaid lining to expand and contract in every direction in the planethereof independently of said support and said outer wall.

7. In a furnace construction, an outer retaining wall, an inner walldisposed in spaced relation to saidouter wall and comprising a .liningof refractory material and a backing therefor, anchor members embeddedin the lining wall, and anchor members secured to said backing andhaving universal connection with the lining wall anchor members, wherebythe lining wall is free torexpand and contract in every direction in theplane thereof independently of said support and said outer wall.

8. In a furnace construction, an outer retaining wall, an inner walldisposed in spaced relation to said outer wall and comprising a liningof refractory material and a backing therefor, anchor members embeddedin the lining wall, anchor members secured to said backing, and tongueand slot connections between the anchor members permitting expansion andcontraction of the inner wall in every direction in the plane thereofindependently of said backing and said outer wall.

9. In a furnace construction, an outer retaining wall, an inner Wallcomprising a backing and a refractory lining, an anchor member securedto said lining, an anchor member on the backing and having universalconnection to the lining anchor member, and means securing the anchormember on the backing to said backing,

said means acting to hold the inner wall spaced away from the outer walland also securing the inner wall and the outer wall together.

10. In a furnace construction, an outer retaining wall, an inner walldisposed in spaced relation to said outer wall and comprising a liningof refractory material and a backing there.- for, an abutment memberextending from the outer -wall and having a U-shapedportion disposed inabutting relation to said outer wall and said backing for holding saidbacking spaced from said outer wall, and means carried by said abutmentmember for securing said lining to said backing and for holding saidlining against movement away from said backing, said means accommodatingexpansion and contraction of the lining in every direction in the planethereof independently of the backing and said outer wall.

11. In a furnace construction, an outer retaining wall, an inner walldisposed in spaced relation to said outer wall and comprising a liningof refractory material and a backing therefor, spacing members extendingfrom the outer wall and disposed in abutting relation to said outer walland said backing for holding said' backing spaced from said outer wall,and means carried by said spacing members for securing said lining tosaid backing and for holding said lining against movement away from saidbacking, said means accommodating expansion and contraction of thelining in every direction in the plane thereof independently'of thebacking and said outer wall.

JOHN E. ANDERSON.

